JPH09182797A - Guidewire - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent transfer of a catheter or losing of a curing position upon exchange of the catheter, shorten time for catheter exchange, reduce consequent burden on a patient upon catheter exchange, to use no gadget to connect an extension wire to a guidewire, which is to be inserted into a live body, and enable to reconnect another extension wire to the guidewire. SOLUTION: To the end of a guide wire 1 for inserting into a live body, a pipe member 12 with an elastic body 11 made of rubber, etc., and fixed therein is connected. On the other hand, at the top of an extension wire 2, an inserting part 15 to be engaged with the elastic body 11 is provided. Into the elastic body 11 at the end of the guide wire 1 for inserting into a live body, the inserting part 15 at the tip of the extension wire 2 is inserted to connect the extension wire 2 to the guide wire 1 for inserting into a live body so as the exchange of the catheter to be easily carried out in a short time. By pulling out the inserting part 15 from the elastic body 11, the elastic body 11 is returned to the original position by its restoring force and is ready for reconnection.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a guide wire which is inserted into a blood vessel of a living body to guide a catheter.

[0002]

2. Description of the Related Art A technique using a plurality of catheters is known as a treatment technique for inserting a catheter into a living body for treatment. As an example, in percutaneous coronary angioplasty,
A balloon catheter is used to advance a balloon of a catheter to a coronary artery stenosis part of a patient, and the balloon is inflated to widen the inner diameter of the artery to expand the stenosis part. In this treatment technique, catheters having different maximum diameters of balloons are generally used, and catheters are exchanged by exchange wires.

An example of a treatment technique using the exchange of the catheter will be specifically shown. First, the diameter is about 0.35 mm and the length is about 1
A 750 mm in-vivo guide wire is inserted from the patient's thigh or the like into the coronary artery stenosis. Next, the first balloon catheter is guided by the guide wire for insertion into the living body and inserted into the living body, and the balloon is guided to the coronary artery stenosis. Next, the in-vivo guide wire inserted in the body is pulled out. Subsequently, the diameter is about 0.35 mm and the length is about 300.
Insert a 0 mm replacement guide wire into the body. Withdraw the first balloon catheter from the body. Next, the second balloon catheters having different balloon diameters are inserted into the living body. Pull out the replacement guide wire from the living body.
Then, the guide wire for insertion in the living body is inserted into the living body. Angioplasty is performed using such catheter replacement.

[0004]

When performing angioplasty using the above-described catheter replacement, the position of the balloon, which is the distal end portion of the catheter, is displaced from the desired position or replaced during the replacement work. The position of the narrowed portion may not be known due to the displacement of the guide wire for use. Further, since the replacement work requires a long time, the burden on the patient becomes large.

In order to eliminate such inconvenience, a thin-walled tube is provided at the end of the in-vivo guide wire inserted into the living body, the distal end of the extension wire is inserted into the thin-walled tube, and the thin-walled tube is fixed by caulking or the like. A technique has been proposed in which an extension wire is connected to a guide wire for inserting into a living body that is inserted into a living body by being compressed and deformed.

However, the above-mentioned connection technique has a problem that a tool for compressing and deforming a thin-walled tube must be used during angioplasty. Furthermore, since the thin-walled tube is compressed and deformed, it is very difficult to remove the extension wire at the connection portion and connect another extension wire.

[0007]

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and an object of the present invention is to shift the position of the catheter or to replace the guide wire during replacement work in which a plurality of catheters are replaced for treatment. It prevents the treatment site from being lost due to the displacement of the catheter, shortens the catheter replacement work to reduce the burden on the patient, and further, when connecting the guide wire for in-vivo insertion and the extension wire, The purpose of the present invention is to provide a guide wire which does not require a tool for easing and can easily remove the extension wire connected first and connect the other extension wire.

[0008]

Means for Solving the Problems The guidewire of the present invention employs the following technical means. [Means of Claim 1] A guide wire comprises a guide wire for in-vivo insertion which is inserted into a blood vessel of a living body from a tip, and an extension wire whose tip is connected to the end of the guide wire for in-vivo insertion, A tubular member having an elastic body fixed therein is provided at one of the distal end of the guide wire for in-vivo insertion and the distal end of the extension wire, and the distal end of the in-vivo insertion guide wire or the distal end of the extension wire is provided. On the other hand, an insertion portion that can be inserted or punctured in the elastic body in the tubular member is provided, and by inserting or puncturing the insertion portion in the elastic body, the elastic force and the friction force of the elastic body cause the elasticity. The body is characterized by holding the insertion part.

[Means for Claim 2] The guide wire includes a guide wire for insertion into a living body which is inserted into a blood vessel of a living body through a tip, and an extension wire which has a tip connected to an end of the guide wire for inserting into a living body. A distal end of the in-vivo insertion guide wire or one of the distal ends of the extension wires is provided with a tubular member having an elastic body fixed therein, and the distal end of the in-vivo insertion guide wire or the extension On the other end of the wire, there is provided an insertion portion that can be inserted or punctured in the elastic body in the tubular member and that has a hooking portion such as a protrusion or a recess or a spiral body that can be caught by the elastic body. When the insertion section is inserted or punctured, the hook section is caught by the elastic body, and the elastic body holds the insertion section.

[Means for Claim 3] In the guide wire according to claim 1 or 2, the tubular member is provided with a through hole penetrating the inside and outside or a convex portion on the inner wall thereof, and a part of the elastic body is The elastic body is fixed in the tubular member by bulging into the through hole or by pressing the elastic body in the axial center direction by the convex portion.

[Means of Claim 4] In the guide wire according to claim 1 or 2, the distal end side of the insertion portion is provided in a tapered shape in which the diameter becomes smaller toward the distal end.

[Means for Claim 5] In the guide wire according to claim 2, the insertion portion is composed only of a twisted hook portion.

[0013]

The operation of the catheter exchange using the guide wire of the present invention will be described. First, the guide wire for insertion into the living body is inserted into the blood vessel of the living body, and the end portion is guided to the treatment site or the like.
Next, the first catheter is guided by the guide wire for insertion into the living body and inserted into the living body, and the end portion of the balloon is guided to the treatment site or the like.

Next, the elastic body inside the tubular member is provided at one of the distal end of the guide wire for insertion into a living body or the tip of the extension wire, and the end of the guide wire for insertion in a living body or the other end of the extension wire. Insert the provided insertion part. Then, the insertion portion is engaged by the elastic force or frictional force of the elastic body in the tubular member, or by the catch between the hook portion and the elastic body, and as a result, the guide wire for inserting in the living body and the extension wire are connected. .

Next, the first catheter is pulled out from the living body, and the second balloon catheter is inserted into the living body.
Then, the catheter replacement procedure is completed by pulling out the insertion part from the elastic body in the tubular member.

[0016]

As described above, the guide wire of the present invention remains in a state where the guide wire for in-vivo insertion is not pulled out at the time of replacement work in which a plurality of catheters are replaced for treatment. . Therefore, it is possible to prevent the position of the treatment site or the like from being lost due to the displacement of the catheter to be replaced or the displacement of the guide wire.

Further, unlike the prior art, since there is no work such as insertion and withdrawal of the exchange guide wire, the exchange work of the catheter can be shortened and consequently the burden on the patient can be reduced. Further, by inserting the insertion portion into the elastic body in the tubular member, the in-vivo insertion guide wire and the extension wire can be connected, and a tool for connection can be eliminated.

Further, since the insertion part is engaged by the elastic force or the catching force of the elastic body inside the tubular member, the insertion part is not deformed, and the elastic body inside the tubular member is also pulled out. Since the original shape is restored to the original shape by the restoring force after the bending, the extension wire connected first can be removed and easily connected to another extension wire, and as a result, the burden on the patient can be reduced.

[0019]

EXAMPLES Next, the guide wire of the present invention will be explained based on the examples shown in the drawings. [Structure of First Embodiment] FIGS. 1 to 5 show a first embodiment of the present invention, and FIG. 1 is a sectional view of a main portion of a guide wire.

The guide wire comprises a guide wire 1 for inserting into a living body which is inserted into a blood vessel and guides the catheter to an affected area, and an extension wire 2 used when replacing the catheter. The end and the tip of the extension wire 2 are provided so as to be connectable.

The guide wire 1 for insertion into a living body is well known except for the distal end, and has a diameter of about 0.35 mm and a length of about 1750.
mm. Specifically, the guide wire 1 for insertion into a living body according to the present embodiment has a maximum diameter of about 0.35 mm and a length of about 17 mm.
A wire body 3 made of stainless steel having a diameter of 50 mm is provided. This wire body 3 has a small diameter portion 4 which gradually becomes flat toward the tip side.
And a curved surface portion 5 is formed at its tip. The small-diameter portion 4 is for easily deforming the distal end side along the bend of the blood vessel when inserting the in-vivo insertion guidewire 1 into the blood vessel. -Ni
The coil spring 6 made of stainless steel and the coil spring 7 made of stainless steel are attached in a joined state.

At the end of the guide wire 1 for insertion into the living body,
As shown in FIGS. 2 and 3, a tubular member 12 having an elastic body 11 fixed therein is provided for connecting the extension wire 2. The shape of the end of the wire body 3 is a rod of small diameter (inner diameter 0.25 mm) via the tapered portion 13 so as to fix the end of the tubular member 12 to the periphery.

The tubular member 12 has an outer diameter of 0.35 mm,
A stainless steel cylinder having an inner diameter of 0.25 mm and a length of 30 mm is fixed to the end of the wire body 3 by a welding technique such as brazing.

The elastic body 11 is made of a rubber material (for example, natural rubber, neoprene rubber, silicon rubber, ethylene propylene rubber, urethane rubber, etc.), a resin material (for example, polyamide elastomer, polyester elastomer, polyurethane elastomer, etc.), or It is appropriately selected from gel-like materials (for example, polyethylene gel, silicon gel, etc.). In this embodiment, the elastic body 11 is fixed to the tubular member 12 by fixing the elastic body 11 to the tubular member 1.
The technique of press-fitting into 2 and the technique of fixing the elastic body 11 in the tubular member 12 using an adhesive are used.

The extension wire 2 has a distal end portion having an insertion portion 15 which is inserted into the elastic body 11 at the end of the guide wire 1 for insertion into a living body and which is engaged by the elastic force and frictional force of the elastic body 11. About 0.35 mm, length about 1270 mm
This is a stainless steel wire.

As shown in FIGS. 4 and 5, the insertion portion 15 has a taper shape in which the diameter becomes smaller toward the distal end.
In this embodiment, the outer diameter is 0.35 m in the range of 20 mm on the tip side.
The first taper portion 16 whose diameter is reduced from m to 0.25 mm in outer diameter
And an outer diameter of 0.08 mm from the end of the first taper portion 16.
A two-step taper shape including a second taper portion 17 having a smaller diameter is adopted (the length of the first taper portion 16 is 0.2 mm, and the remaining length is the length of the second taper portion 17). 2 taper part 1
The structure in which 7 is inserted into the elastic body 11 is adopted. The end of the second taper portion 17 is chamfered into a curved surface.

[Operation of Embodiment] Next, the engagement / disengagement of the guide wire 1 for insertion into the living body and the extension wire 2 will be described. (At the time of engagement) The insertion portion 15 is pushed into the elastic body 11 of the tubular member 12, and the insertion portion 15 is inserted into the elastic body 11. Then, due to the restoring force of the elastic body 11, the insertion portion 15
Is pressed against the elastic body 11, and the insertion portion 15 is held in the elastic body 11. In this way, by inserting the insertion portion 15 into the elastic body 11 of the tubular member 12, the distal end of the in-vivo insertion guide wire 1 and the distal end of the extension wire 2 engage with each other.

(During separation) A force for separating the distal end side of the guide wire 1 for insertion into the living body and the distal end side of the extension wire 2 is applied. Then, the restoring force of the elastic body 11 causes the insertion portion 15 held in the elastic body 11 to come out of the elastic body 11. Thus, by separating the distal end side of the in-vivo insertion guide wire 1 and the distal end side of the extension wire 2, the distal end of the in-vivo insertion guide wire 1 and the distal end of the extension wire 2 are disengaged. . The elastic body 11 from which the insertion portion 15 is pulled out is restored to its original shape by its own restoring force. Therefore, the extension wire 2 connected first can be removed, and another extension wire or the like having a different length can be easily connected to the end of the in-vivo insertion guide wire 1.

[Effects of the Embodiment] In the guide wire of this embodiment, the extension wire 2 is connected without pulling out the guide wire 1 for insertion into the living body during the replacement work in which a plurality of catheters are replaced for treatment. The catheter can be replaced. In this way, during the replacement work, the guide wire 1 for insertion into the living body is not pulled out and remains in that state,
It is possible to prevent the position of the treatment site or the like from being lost due to the displacement of the catheter to be replaced or the displacement of the guide wire.

At the time of exchanging work in which a plurality of catheters are exchanged for treatment, the extension wire 2 can be connected to exchange the catheters without pulling out the guide wire 1 for insertion into the living body. , Replacement guide wire 1
There is no work to insert or pull out. Therefore, the catheter replacement work can be shortened, and as a result, the burden on the patient can be reduced.

The insertion portion 15 is inserted into the elastic body 11 in the tubular member 12.
Since the guide wire 1 for insertion in the living body and the extension wire 2 can be connected by inserting, the tool for connection becomes unnecessary. Due to the structure in which the insertion portion 15 is engaged by the elastic force of the elastic body 11 in the tubular member 12, the insertion portion 1
5 does not deform, and the elastic body 11 in the tubular member 12 returns to the original shape by the restoring force after the insertion portion 15 is pulled out, so that the extension wire 2 that is connected first is removed and other lengths different from each other are removed. An extension wire or the like can be easily connected to the distal end of the guide wire 1 for insertion into the living body, and as a result, the burden on the patient at the time of operation can be reduced.

[Second Embodiment] FIGS. 6 and 7 show a second embodiment, showing the shape of the distal end of the guide wire 1 for insertion into a living body. The tubular member 12 of the present embodiment is provided with a plurality of through holes 21 (six in this embodiment) penetrating the inside and the outside of the tubular member 12 at the portion where the elastic body 11 is inscribed. The elastic body 11 is press-fitted inside the tubular member 12.

By being provided in this way, the elastic body 11 is pressed against the inner wall of the tubular member 12 by the restoring force of the elastic body 11 press-fitted inside the tubular member 12, and a part of the elastic body 11 penetrates. The elastic body 11 bulges into the hole 21, the bulging elastic body 11 generates a locking force in the through hole 21, and the elastic body 11 is fixed in the tubular member 12. That is, the fixing force of the elastic body 11 in the tubular member 12 is increased by providing the tubular member 12 with the plurality of through holes 21.

[Third Embodiment] FIGS. 8 and 9 show a third embodiment, showing the shape of the distal end of the guide wire 1 for insertion into a living body. In the tubular member 12 of this embodiment, after the elastic body 11 is arranged inside, a plurality of convex portions 22 (in this embodiment, 3) are formed on the inner wall by applying force from the outside to indent the tubular member.
One) is provided. By being provided in this way, the elastic body 11 arranged inside the tubular member 12 is
It is pressed in the inner diameter direction by the convex portion 22. That is, by providing the plurality of convex portions 22 on the inner wall of the tubular member 12,
The fixing force of the elastic body 11 in the tubular member 12 is increased.

[Fourth Embodiment] FIG. 10 shows a fourth embodiment, showing the shape of the distal end of the guide wire 1 for insertion into a living body. In the above embodiment, the end of the elastic body 11 (the end on the side where the insertion portion 15 is inserted) is the tubular member 12.
Although an example is shown that is recessed inward from the tip of the
As shown in 0, the end of the elastic body 11 and the tip of the tubular member 12 may be provided on the same plane. Further, in the above embodiment, the example in which the tubular member 12 is provided by being joined to the wire main body 3 is shown. However, as shown in FIG. 10, the end portion of the wire main body 3 is provided in a tubular shape so that the tubular member 12 is provided. You may form.

[Fifth and Sixth Embodiments] FIGS. 11 and 12
Shows the fifth and sixth embodiments, respectively, showing the shape of the distal end of the in-vivo insertion guide wire 1. In the above-described embodiment, an example in which the solid elastic body 11 is fixed in the tubular member 12 is shown. However, as shown in FIGS. 11 and 12, a hole 11a may be provided in the central portion of the elastic body 11. good.

As described above, the hole 1 is formed in the central portion of the elastic body 11.
By providing 1a, the insertion portion 15 is inserted along the hole 11a, so that the insertion force when inserting the insertion portion 15 can be reduced, and the insertion portion 15 can be securely attached to the elastic body 1.
It becomes possible to insert it in the central part of 1.

[Seventh Embodiment] FIGS. 13 and 14 show a seventh embodiment.
It shows an embodiment and shows the shape of the tip of the extension wire 2. The insertion portion 15 of the present embodiment is provided with a bulging portion 23 that bulges in the outer diameter direction at an intermediate portion of the second tapered portion 17 inserted into the elastic body 11.

By being provided in this way, the bulging portion 23 inserted in the elastic body 11 strongly presses the elastic body 11, and the bulging portion 23 resists in the direction of coming out of the elastic body 11. That is, by providing the bulging portion 23 in the intermediate portion of the second taper portion 17, the force with which the elastic body 11 holds the insertion portion 15 can be increased.

[Eighth Embodiment] FIG. 15 shows an eighth embodiment, showing the shape of the tip of the extension wire 2. Although the surface of the insertion portion 15 is relatively smooth in the above-described embodiment, as shown in FIG. 15, the surface of the insertion portion 15 may be finished into a rough surface having a large frictional force. By providing in this way, the frictional force between the elastic body 11 and the insertion portion 15 is increased, and the elastic body 11 is inserted into the insertion portion 15
The force to hold can be increased.

[Ninth, Tenth and Eleventh Embodiments] FIG.
17 and 18 show the ninth, tenth, and eleventh embodiments, respectively, showing the shape of the tip of the extension wire 2. In the above embodiment, the elastic body 11 is mainly used for the insertion portion 15.
Although the elastic body 11 and the insertion portion 15 are engaged with each other by the force for elastically holding the elastic body 11 and the frictional force between the elastic body 11 and the insertion portion 15, as shown in FIG. A plurality of return needles 15a (corresponding to hooking portions) are provided, or as shown in FIG. 17, a plurality of cones 15b (corresponding to hooking portions) are provided in the insertion portion 15.
18, or as shown in FIG. 18, a wood screw-shaped (helical) engagement protrusion 15c (corresponding to a hook portion) around the insertion portion 15.
May be provided.

In this way, the return needle 15a is inserted into the insertion portion 15,
By providing the hooks such as the conical body 15b and the engaging projections 15c, when the insertion portion 15 is inserted into the elastic body 11, the hooks such as the return needle 15a, the conical body 15b and the engaging projections 15c are attached to the elastic body 11. The elastic body 11 and the insertion portion 1 are hooked.
The engagement force with 5 can be increased.

[Twelfth Embodiment] FIGS. 19 and 20 show a twelfth embodiment, showing the shape of the tip of the extension wire 2. The insertion portion 15 of the present embodiment is formed in a flat plate shape, and is provided with a plurality of (three in this embodiment) resistance holes 24 (corresponding to hooking portions) penetrating therethrough.

By being provided in this way, a part of the elastic body 11 enters the inside of the resistance hole 24 of the insertion portion 15 inserted in the elastic body 11, and the inserted elastic body 11 is inside the resistance hole 24. It is caught and generates a locking force.
That is, the insertion portion 15 is provided in a flat plate shape, and
By providing the plurality of resistance holes 24 penetrating therethrough, the engaging force between the insertion portion 15 and the elastic body 11 can be increased.

[Thirteenth Embodiment] FIGS. 21 and 22 show a thirteenth embodiment, showing the shape of the distal end of the extension wire 2. The insertion portion 15 of the present embodiment is provided in a flat plate shape, and is provided with a plurality of (three in this embodiment) protruding portions 25 (corresponding to hooking portions) protruding outwards on both sides.

By being provided in this way, the protrusion 25 of the insertion portion 15 inserted into the elastic body 11 becomes
It is caught on and generates locking force. That is,
By providing the insertion portion 15 in a flat plate shape and providing a plurality of protrusions 25, the insertion portion 15 and the elastic body 11 are provided.
The engagement force of the can be increased.

[Fourteenth, Fifteenth and Sixteenth Embodiments] FIG. 2
3, FIG. 24, and FIG. 25 show the fourteenth, fifteenth, and sixteenth embodiments, respectively, showing the shape of the tip of the extension wire 2. The insertion portion 15 of this embodiment is shown in FIGS.
As shown in FIG. 4 and FIG. 25, the insertion portion 15 is provided in a rod shape, and the tip portion is sharpened like a needle. When the insertion portion 15 is provided in a rod shape as in the present embodiment, the elastic body 11 is preferably solid. When the hole 11a is provided at the center of the elastic body 11, the diameter of the hole 11a is smaller than that of the rod portion. It is desirable that the diameter is smaller than the diameter (as shown in FIG. 23, when the insertion portion 15 does not have the hook portion, the diameter of the hole 11a needs to be smaller than the diameter of the rod portion).

[Seventeenth Embodiment] FIG. 26 shows a seventeenth embodiment, showing the shape of the distal end of the extension wire 2. The insertion portion 15 of this embodiment is provided in a twisted flat plate shape. By providing the insertion portion 15 in this way, the insertion portion 15 itself functions as a hook portion hooked on the elastic body 11. That is, the twisted portion of the insertion portion 15 inserted into the elastic body 11 is caught by the elastic body 11 and a locking force is generated. In this way, by providing the insertion portion 15 in a twisted flat plate shape, the insertion portion 15
The engaging force of the elastic body 11 can be increased.

[Eighteenth Embodiment] FIG. 27 shows an eighteenth embodiment, showing the shape of the distal end of the extension wire 2. The insertion portion 15 of the present embodiment is formed into an elongated rod shape, folded back in two, and then twisted.
By providing the insertion portion 15 in this way, the insertion portion 15 itself functions as a hook portion hooked on the elastic body 11. That is, the twisted portion of the insertion portion 15 inserted into the elastic body 11 is caught by the elastic body 11 to generate a locking force.

[Nineteenth Embodiment] FIG. 28 shows a nineteenth embodiment, showing the shape of the distal end of the extension wire 2. The insertion portion 15 of this embodiment is formed in a spiral shape and an elongated rod shape. By providing the insertion portion 15 in this way, the insertion portion 15 itself functions as a hook portion hooked on the elastic body 11. That is, the twisted portion of the insertion portion 15 inserted into the elastic body 11 is caught by the elastic body 11 to generate a locking force.

[Modification] In the above embodiment, the elastic body 11 is used.
Although the tubular member 12 fixed inside is provided at the end of the guide wire 1 for in-vivo insertion and the insertion portion 15 is provided at the distal end of the extension wire 2, conversely, the insertion portion 15 is inserted in the living body. The tubular member 12 provided at the end of the guide wire 1 and having the elastic body 11 fixed therein may be provided at the tip of the extension wire 2. The numerical values, materials, structures, shapes, etc. shown in the above embodiments are examples used for explaining the embodiments, and the present invention is not limited to the embodiments and can be appropriately changed. .

[Brief description of the drawings]

FIG. 1 is a sectional view of a main part of a guide wire (first embodiment).

FIG. 2 is a sectional view of a distal end of a guide wire for inserting into a living body (first embodiment).

FIG. 3 is a sectional view taken along line AA of FIG. 2 (first embodiment).

FIG. 4 is a side view of the tip of the extension wire (first embodiment).

5 is a sectional view taken along line BB of FIG. 4 (first embodiment).

FIG. 6 is a side view of the distal end of the guide wire for inserting into a living body (second embodiment).

FIG. 7 is a view from C of FIG. 6 (second embodiment).

FIG. 8 is a side view of the distal end of the guide wire for inserting into a living body (third embodiment).

FIG. 9 is a D view of FIG. 8 (third embodiment).

FIG. 10 is a side view of the tip of the extension wire (fourth embodiment).

FIG. 11 is a side view of the tip of the extension wire (fifth embodiment).

FIG. 12 is a side view of the tip of the extension wire (sixth embodiment).

FIG. 13 is a side view of the tip of the extension wire (seventh embodiment).

FIG. 14 is a cross-sectional view taken along line EE of FIG. 13 (seventh example).
Example).

FIG. 15 is a side view of the tip of the extension wire (eighth embodiment).

FIG. 16 is a side view of the tip of the extension wire (ninth embodiment).

FIG. 17 is a side view of the tip of the extension wire (tenth embodiment).

FIG. 18 is a side view of the tip of the extension wire (11th embodiment).

FIG. 19 is a side view of the tip of the extension wire (twelfth embodiment).

FIG. 20 is a view from F of FIG. 19 (twelfth embodiment).

FIG. 21 is a side view of the tip of the extension wire (thirteenth embodiment).

22 is a cross-sectional view taken along the line GG of FIG. 21 (first
3 examples).

FIG. 23 is a side view of the distal end of the extension wire (14th embodiment).

FIG. 24 is a side view of the tip of the extension wire (fifteenth embodiment).

FIG. 25 is a side view of the distal end of the extension wire (sixteenth embodiment).

FIG. 26 is a side view of the distal end of the extension wire (17th embodiment).

FIG. 27 is a side view of the tip of the extension wire (18th embodiment).

FIG. 28 is a side view of the tip of the extension wire (the 19th embodiment).

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Guide wire for in-vivo insertion 2 Extension wire 11 Elastic body 12 Tubular member 15 Insertion part 15a Return needle (hooking part) 15b Conical part (hooking part) 15c Engagement protrusion (hooking part) 21 Through hole 22 Convex part 23 Swelling Part 24 Resistance hole (hooking part) 25 Projection part (hooking part)

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Masaru Uchiyama 2-6-1, Marunouchi, Chiyoda-ku, Tokyo Day Zeon Corporation (72) Inventor Akira Sekido 2-6-1-1, Marunouchi, Chiyoda-ku, Tokyo Date Inside Zeon Corporation

Claims (5)

[Claims] 1. An in-vivo guide having an in-vivo insertion guide wire inserted into a blood vessel of an organism from a distal end, and an extension wire having a distal end connected to an end of the in-vivo insertion guide wire, A tubular member having an elastic body fixed therein is provided at one end of the wire or one end of the extension wire, and the tubular member is provided at the other end of the guide wire for in-vivo insertion or the other end of the extension wire. By providing an insertion portion that can be inserted or punctured in the elastic body in the member, and by inserting or puncturing the insertion portion in the elastic body, the elastic body by the elastic force and frictional force of the elastic body A guide wire characterized by being held. 2. A guide for in-vivo insertion, comprising a guide wire for in-vivo insertion inserted into a blood vessel of a living body from a tip, and an extension wire having a tip connected to an end of the guide-wire for in-vivo insertion. A tubular member having an elastic body fixed therein is provided at one end of the wire or one end of the extension wire, and the tubular member is provided at the other end of the guide wire for in-vivo insertion or the other end of the extension wire. To insert or puncture the elastic body in the member, the insertion portion having a protrusion or a recess that can be caught by the elastic body or a hooking portion such as a spiral body, and inserting the insertion portion into the elastic body. The guide wire is characterized in that the hooking portion is hooked on the elastic body, and the elastic body holds the insertion portion. 3. The guide wire according to claim 1 or 2, wherein the tubular member has a through hole penetrating the inside and the outside and a convex portion on an inner wall thereof, and a part of the elastic body expands into the through hole. The guide wire, wherein the elastic body is fixed in the tubular member by being pushed out or by the elastic body being pressed by the convex portion in the axial center direction. 4. The guide wire according to claim 1 or 2, wherein the distal end side of the insertion portion is provided in a tapered shape with a diameter decreasing toward the distal end. 5. The guide wire according to claim 2, wherein the insertion portion is composed of only a twisted hook portion.